I use a 2 pound bag of beans.
I also use Garlic, and onion. My onion is usually dry minced onion flakes. about 1/4 cup. Garlic, is Dry powder, or chips. about 2 Tablespoons. Whichever is on hand. I also use about a teaspoon-Plus of Cumin.
I have experimented with small amounts of other seasonings. Italian Seasoning, Chili powder, and others that call out to me.

The soaked beans get final rinse,, and then; I have it figured out the correct amount of cooking water. About 1 inch+ above the beans level.
This method, I don't need to drain any excess liquid. When cooking is done, on small to medium flame, I mash.
Found this to be easy, and don't loose any of my seasonings to water draining.